Tab_Fault diagnosis
7
Tab_Fault diagnosis
8
Disassembly and disposal
4
8017528 | SICK
LED indicator/fault pattern /
LED indicator/fault pattern
Green LED does not light up or
flickers /
Green LED does not light up or
flickers
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Green LED does not light up /
Green LED does not light up
Yellow LED lights up, no object in
the path of the beam /
Yellow LED lights up, no object in
the path of the beam
The sensor must be disposed of according to the applicable country-specific regulations. Efforts
should be made during the disposal process to recycle the constituent materials (particularly pre‐
cious metals).
Cause /
Cause
Sensor is still ready for operation,
but the operating conditions are
not ideal (operating reserve factor
between 0.9 and 1.1) /
Sensor is still ready for operation,
but the operating conditions are
not ideal (operating reserve factor
between 0.9 and 1.1)
No voltage or voltage below the
limit values /
No voltage or voltage below the
limit values
Voltage interruptions /
Voltage interruptions
Sensor is faulty /
Sensor is faulty
The beam of light of a photoelect‐
ric through-beam sensor hits the
receiver of another (neighbo‐
ring) photoelectric through-beam
sensor /
The beam of light of a photoelect‐
ric through-beam sensor hits the
receiver of another (neighbo‐
ring) photoelectric through-beam
sensor
Measures /
Measures
Check the operating conditions:
Fully align the beam of light (light
spot) with the receiver. / Clean
the optical surfaces / Readjust
the sensitivity (potentiometer) / If
the potentiometer is set to the
max. sensing range: Reduce the
distance between the sender and
the receiver, and check against
Graphic E / Check sensing range
and adjust if necessary, see Gra‐
phic E /
Check the operating conditions:
Fully align the beam of light (light
spot) with the receiver. / Clean
the optical surfaces / Readjust
the sensitivity (potentiometer) / If
the potentiometer is set to the
max. sensing range: Reduce the
distance between the sender and
the receiver, and check against
Graphic E / Check sensing range
and adjust if necessary, see Gra‐
phic E
Check the power supply, check all
electrical connections (cables and
plug connections) /
Check the power supply, check all
electrical connections (cables and
plug connections)
Ensure there is a stable power
supply without interruptions /
Ensure there is a stable power
supply without interruptions
If the power supply is OK, replace
the sensor /
If the power supply is OK, replace
the sensor
Swap the sender and receiver
arrangement at every second pho‐
toelectric through-beam sensor
and ensure that there is sufficient
distance between the through-
beam photoelectric sensors /
Swap the sender and receiver
arrangement at every
second photoelectric through-
beam sensor and ensure that
there is sufficient distance bet‐
ween the through-beam photo‐
electric sensors